UL 2703 STANDARD FOR SAFETY Mounting Systems, Mounting Devices,Clamping/Retention Devices, and Ground Lugs for Use with Flat-PlatePhotovoltaic Modules and Panels
Scope
1.1 These requirements cover rack mounting systems，mounting grounding/bonding devices,andclampinglretention devices for specific(manufacturerlmodel designation) flat-plate photovoltaic modulesand panels that comply with the Standard for Flat-Plate Photovoltaic Modules and Panels, UL 1703,or theStandard for Photovoltaic (PV)Module Safety Qualification - Part 1:Requirements For Construction, UL61730-1 and the Standard for Photovoltaic (PV)Module Safety Qualification - Part 2: Requirements ForTesting, UL 61730-2, intended for installation on or integral with buildings, or to be freestanding (i.e., notattached to buildings), in accordance with the National Electrical Code, ANSI/NFPA 70 and Model BuildingCodes.Systems,components andlor devices evaluated under this standard may be used to groundand/or mount a PV module complying with UL 1703 or UL 61730-1 and UL 61730-2 when the specificmodule or frame has been evaluated for bonding/grounding or the module has been evaluated formounting with the evaluated system, component or device.
1.2 These requirements cover rack mounting systems and clamping devices intended for use withphotovoltaic module systems with a maximum system voltage of 1500 v.
1.3 These requirements cover rack mounting systems,clamping，retention devices pertaining toground/bonding paths, mechanical strength, and suitability of materials only.
1.4 These requirements do not cover:
a) Equipment intended to accept the electrical output from the array, such as power conditioningunits (inverters) and batteries.
b) Solar trackers or tracker mechanisms (except as specifically directed as to be utilized by theOutline of Investigation for Solar Trackers,UL 3703 and in combination with UL 3703).
c)Cell assemblies intended to operate under concentrated sunlight.
d)Optical concentrators.
e)Combination photovoltaic-thermal modules or panels.
f) Equipment intended to carry current as a normal function of that component, such as combinerboxes,connection boxes (other than connection box for grounding), wireways and enclosureshousing live parts.See the Standard for Flat-Plate Photovoltaic Modules and Panels, UL 1703 orthe Standard for Photovoltaic(PV) Module Safety Qualification - Part 1: Requirements ForConstruction，UL 61730-1, or the Standard for Inverters， Converters， Controllers andInterconnection System Equipment for Use With Distributed Energy Resources,UL 1741.
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